Efficiency analysis using microbiome and metabolome data and modeling of acquisition and allocation in dairy cows (EMMA²)

This research project aims to develop a novel efficiency breeding value for dairy cows that separately evaluates the ability to acquire resources from feed (acquisition) and the distribution of available resources among various bodily functions (allocation). Unlike previous approaches based on the concept of residual feed intake, this method seeks to enable genetic improvement of resource efficiency without compromising animal health or welfare through an intensified negative energy balance during early lactation.

Initially, resource acquisition and allocation will be characterized throughout the entire lactation period using a combination of suitable traits. Based on these results, appropriate indicator traits will be identified that reliably reflect both efficiency components while also being suitable for routine recording in agricultural practice.

Additionally, genomic data will be used to identify genomic regions or genes associated with resource acquisition and allocation. On this basis, BLUP models will be developed to estimate breeding values ​​for acquisition and allocation, allowing both components of resource efficiency to be addressed independently in future breeding programs.

The insights gained are intended to deepen the understanding of the biological mechanisms underlying resource efficiency in dairy cows. Furthermore, predictive models will be developed to forecast the efficiency breeding value using genomic information. The ultimate goal is to advance the new efficiency breeding value to the point of practical application and to disseminate the research findings effectively within both the scientific community and the breeding sector.

• Begin: 07/2026 | End: 06/2030
  
• Funding: BLE